Former New York City Transportation Commissioner Janette Sadik-Khan says cities can tackle the challenges of tomorrow by completely re-imagining our streets today.

About Janette Sadik-Khan

As commissioner of the NYC Department of Transportation under the Bloomberg administration, Janette Sadik-Khan was responsible for an aspect of the city that hides in plain sight: the streets, highways, bridges, signs and lights.

For six years she was responsible for some 6,300 miles of streets throughout the city's five boroughs. Sadik-Khan adopted a designer's approach to urban innovation: try an idea to see if it works; if it doesn't, try something else.

Under her watch, the city created pedestrian plazas, rapid bus transit, safe bike lanes and a bike share program.